Nice lightbar - is it the incandescent or LED version? Where do you want to mount the switch panel? Did you say you do have a sunroof?

I have not installed an external lightbar on my Xterra, but currently have Whelen strobes mounted all over. Four internal Dashmisers mounted facing out the rear on top, two hide-a-way strobes in the rear turn signal lights and a brake/reverse light flasher. On the front I have two hide-a-ways in the corner lights, two strobes mounted behind the grill, dashking above the rear-view mirror and LED slim-lighter mounted on the upper part of the passenger side front window. Also wig-way headlights and two Talon LED lights facing out both sides of the rear cargo area windows. You can't miss me with all those lights! Expensive setup, but I pieced it together over the past few years little by little. I wanted something that did not stand out when I did not need them, and most people don't even notice the lights when they are off which is nice. Not sure if you made the purchase yet, but Whelen has their new Patriot LED lightbar which looks really sweet... http://www.whelen.com/ll1428.htm

I'm sure some other guys (and gals) will post with some tips. Good luck and have fun with the install and keep us updated.

TLV